disc galaxies造句

例句与造句

1. The galactic disc is the plane in which the spirals, bars and discs of disc galaxies exist.
2. It has been noted that the orbital velocity of stars in the disc of most disc galaxies is inconsistent with the amount of luminous matter calculated for the galaxy.
3. The theory of the Rossby wave instability ( RWI ) in accretion discs was developed by Lovelace et al . and Li et al . for thin Keplerian discs with negligible self-gravity and earlier by Lovelace and Hohlfeld for thin disc galaxies where the self-gravity may or may not be important and where the rotation is in general non-Keplerian.
4. It's difficult to find disc galaxies in a sentence. 用disc galaxies造句挺难的